package com.sky.service.impl;


import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    DishMapper dishMapper;

    @Autowired
    SetmealMapper setmealMapper;

    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        //判断当前加入购物车的商品是否已经存在了
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        //如果已经存在了，只需要将数量加一
        if(list!=null&&list.size()>0){
            ShoppingCart cart= list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumberById(cart);
        }
        //如果不存在，需要插入一条购物车数据
        else{
            //来判断本次添加到购物车的是菜品还是套餐
            Long dishId=shoppingCartDTO.getDishId();
            Long setmealId=shoppingCartDTO.getSetmealId();
            if(dishId!=null){
                Dish dish= dishMapper.getById(dishId);
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setName(dish.getName());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }
            else{
                Setmeal setmeal=setmealMapper.getById(setmealId);
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long userid=BaseContext.getCurrentId();
        ShoppingCart shoppingCart= ShoppingCart.builder()
                .userId(userid)
                .build();
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {
        Long userId=BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }
}
